By mechanics, I mean the generally-accepted explanation of how it works, not necessarily why gravity exists."
No. The mechanics of gravity are well known. And I'm not about to get into some stupid 'gotcha' comparison of Newtonian physics and Relativity.
But the claims presented in some of the threads on Free Republic ( don't get me started on the Dawkins " ...given enough time, pigs will fly..." stupidity), evolution is predictive. And I'm not talking in the sense of " we see a progression of evidence in the fossil record, therefore, we predict a progression of evidence in the fossil record " crap. That is a tautology.
I want to see a definite prediction that bears fruit, i.e., starting with simple organisms, without purposeful prior selection, a demonstration of enviromental conditions forcing a change in species.
As for the trap of explaining mechanics, lets just say that the laws governing the motion of planets around the sun can predict within a rather good degree of accuracy where those planets will be 10 years from now.